Telescope-sight.



'. L. SMITH.

TELnscoPE SIGHT.

AI'PLIOATION FILED APB.. 5, 1910. 964,?03. Patented July 19, 1910.

Inventor ,Attest 1H: NcRRls PETERS ca.. wAsnmcroN, n. c.

@FTF f FREDERICK L. SMITH, OF CHICOPEE FALLS, MASSACHUSETTS.

TELnscoPn-sien'r.

To all whom it may concern:

Be it known that I, FREDERICK L. SMITH, a citizen of the United States, residing in Chicopee Falls, in the State of Massachusetts, have invented certain new and useful Improvements in Telescope-Sights, of which the following is a specification, reference being had to the accompanying drawing, forming a part hereof.

This invent-ion relates more particularly to telescope sights for use on rifles in target shooting where great accuracy is required, but obviously the invention is applicable also to telescope sights which are designed for use for other purposes, such as in connection with surveyors instruments. Such telescopes, when designed for very line sighting, are usually equipped with cross hairs, that is, two tine filaments placed at right angles to each other with the intersection in the axis of the telescope. It frequently happens that through astigmatism or some other defeet in vision, the user is unable to see both cross hairs with equal distinctness and is sometimes unable to see one of the hairs at all, when the cross hairs occupy fixed positions with respect to each other, as has been the case heretofore.

It is the object of this invention to meet the difficulty which thus sometimes exists in the use of fixed cross hairs, by making the cross hairs adjustable independently of each other. Such independent adjustment may be either rotary, for the purpose of varying the angle of inclination of either or both of the cross hairs, or in the direction of the axis of the telescope for the purpose of properly focusing either or both of the cross hairs with respect to the adjacent lens or lenses.

The invention will be more fully eX- plained hereinafter with reference to the accompanying drawing in which it is illustrated and in which- Figure l is a view in elevation of a military rifle equipped with a telescope sight. Fig. 2 is a top view of the telescope, on a larger scale, and partly broken away to save space. Fig. 3 is a view in vertical section on the plane indicated by the broken line 3 3 of Fig. 2. Figs. 4 and 5 are views in transverse section on the planes indicated by the broken lines 4-4 and 5 5 respectively, looking in the direction of the arrows.

In the drawing, the telescope tube o is Specification of Letters Patent.

Application filed April 5, 1910.

Patented July 19, 1910.

Serial No. 553,624.

shown as supported by suitable mounts Z), b, on the barrel of a military rifle c of well known type. rhe telescope tube a is of suitable length and is provided with lenses d, cl, which may be of any suitable kind and number and arranged in any suitable manner. One of the cross hairs, as e, is shown as supported by a suitable support or carrier f, which is preferably a short sleeve mounted to have both a longitudinal movement of adjustment and an angular or rotary movement of adjustment within the tube c. It may be held in adjusted position by a set screw g, which passes through a cover plate L and through an aperture a', enlarged both laterally and longitudinally, in the wall of the telescope tube a into the sleeve c, the screw g forming a projection by means of which the sleeve e may be moved in any direction and the enlarged opening a permitting such movement as is necessary, while the cover plate 71. prevents the access of dust and moisture. The cross hair e may therefore be adjusted angularly about the axis of the tube and may also be adjusted longitudinally in the tube with respect to the focus of the lens d. The other cross hair z' is supported by a similar sleevelike support or carrier c mounted in the tube a and adapted to be held in adjusted position by a set screw Z which passes through a cover plate m and an enlarged opening a2 in to the sleeve 7c, the cross hair i being therefore adjustable angularly about the aXis of the tube and longitudinally with respect to the focus of the adjacent lens. Normally the two hairs are at right angles to each other, but the angular position of one or the other, or of both, may be adjusted to accommodate the eye of the user and either or both may be adjusted longitudinally with respect to the adjacent lens or lenses, so that both may be brought into positions in which both will be clearly visible to the user notwithstanding any ordinary defects of vision.

I claim as my invention:

l. In a telescope sight, the combination with a telescope tube, of independent cross hairs and independent carriers for said cross hairs, one of said carriers being movable for adjustment independently of the other.

2. In a telescope sight, the combination with a telescope tube, of independent cross hairs and independent carriers for said cross hairs, both of said carriers being movable for adjustment independently of each other.

3. In a telescope sight, the combination with a telescope tube, of independent cross hairs and independent carriers for said cross hairs7 one of said carriers being movable longitudinally and angularly independently of the other carrier.

t. In a telescope sight, the combination With a telescope tube, of independent cross hairs and independent carriers for said cross hairs, both of said Carriers being movable longitudinally and angularly independently 15 of each other.

5,ln a telescope sight, the combination of a 'telescope tube having a laterally en larged hole, a sleeve-like sight Carrier, a cover plate and a set screw passed through 20 the cover plate and through said hole into the sleeve-like carrier.

This specification signed and witnessed this 30th day of March, A. D. 1910.

F. L. SMITH.

Signed in the presence ot- A. F. CROWTHER, Jas. F. @Annu-1ER. 

